Hearing instrument, and a method of operating a hearing instrument

A hearing instrument comprising an in-the-ear-canal component to be worn at least partially in the ear of a user, and at least one first microphone operable to convert an acoustic input signal incident on the hearing instrument into an electrical input signal, a signal processor operable to convert the electrical input signal into an electrical output signal on a signal path, and an electrical-to-acoustic converter for converting the electrical output signal into an acoustic output signal, the electrical-to-acoustic converter comprising at least one first receiver in operative communication with a remaining volume in front of the user's ear drum, the hearing instrument further defining a duct between the remaining volume and a surrounding atmosphere, and comprising a second microphone in operative communication with said duct and operable to record a duct acoustic signal in said duct, and further comprising a second electrical-to-acoustic converter in operative communication with said duct, wherein the signal processor is operable to carry out the following steps:

• Generating a feed-forward compensation signal by tapping a signal from the signal path, and processing the tapped signal into an electrical compensation signal in real time;
• Supplying the electrical compensation signal to the second electrical-to-acoustic converter;
• Detecting a duct acoustic signal;
• and
• Minimizing the acoustic signal in the duct by using the detected acoustical signal in the duct as error signal and adapting, based on the recorded duct acoustic signal, at least one of processing parameters and of a processing structure for said processing the signal into an electrical compensation signal.

A hearing instrument comprising an in-the-ear-canal component to be worn at least partially in the ear of a user, and at least one first microphone operable to convert an acoustic input signal incident on the hearing instrument into an electrical input signal, a signal processing means operable to convert the electrical input signal into an electrical output signal on a signal path, and an electrical-to-acoustic converter for converting the electrical output signal into an acoustic output signal, the electrical-to-acoustic converter comprising at least one first receiver in operative communication with a remaining volume in front of the user's ear drum, the hearing instrument further defining a duct between the remaining volume and a surrounding atmosphere, and comprising a second microphone in operative communication with said duct and operable to record an acoustic signal in said duct, and further comprising a second receiver in operative communication with said duct, wherein a path of an acoustic signal produced by said second receiver intersects the duct at the same position along said duct as an acoustic signal path to said second microphone, the hearing instrument further comprising a compensation controller, wherein an input of said compensation controller is in operative connection with said signal path, and wherein an output of said second microphone is in operative connection with a further input of said compensation controller, and wherein the compensation controller is operable to convert a signal from the signal path into a compensation signal fed to the second receiver, and wherein the compensation controller is further operable to adapt, based on an error signal input from the second microphone, at least one of processing parameters and of a processing structure for said processing the signal into an electrical compensation signal.